Question detail
Explain why transition-metal ions are often coloured.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Transition metals (A-level only)
Question
Explain why transition-metal ions are often coloured.
Answer
Transition-metal ions are often coloured due to the presence of partially filled d orbitals. When light hits these ions, electrons can be excited from a lower energy d orbital to a higher energy d orbital. This absorption of specific wavelengths of light results in the complementary colour being observed.
Explanation
This answer is strong because it clearly identifies the cause (partially filled d orbitals), explains the mechanism (electron excitation), and states the effect (absorption of light leading to observed colour). It tests the student's understanding of the relationship between electronic structure and colour in transition metals.
Common mistake
Misunderstanding Color in Transition Metals
Students often think that all transition-metal ions are colored due to their d-electrons being fully filled.
Understand that transition-metal ions are colored because they have partially filled d-orbitals, allowing for d-d electron transitions when they absorb specific wavelengths of light, resulting in the observed color.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.